How about an adjustable bench made from hard maple and American beech:
From low:
To high:
and in between in 1" increments:
The adjustable legs and ratchet mechanism appear spindly and unstable, but are just the opposite. The bench is rock solid at all heights.
It has three types of vises- a full-width, twin-screw, end vise (with recessed sprockets and chain, and custom cover),
a quick-release face vise,
and a sliding tail vise.
Since they run cross-grain, the end aprons (end caps) were not glued, but left to float to allow for seasonal expansion. There are no exposed bolts or plugged bolt holes to mar the appearance of the end caps. Instead, they are held snug to the bench with hidden bolts which can be tightened easily.
The end caps are positioned with blind, full-width mortise and tenon joints. Barrel bolts (in holes drilled from the bottom of the aprons), threaded rod (in holes drilled in back of the aprons and inserted in a hole drilled in the ends of the bench) and a nut w/washer (in a pocket on the underside of the bench) hold the aprons securely to the bench. Large, hand-cut dovetails keep the apron corners tight.
And then there is the adjustable height assembly table: